#![no_std]
#![no_main]

use cstr_core::{cstr, CStr};

use kos::{Color, Dot, Event, Size, WindowKind, WindowParams, WindowTextParams};

const HEADER: &CStr = cstr!("Hey Kolibri");
const MSG: &str = "Hello from Rust!";

#[inline(always)] // for some reason function removed otherwise
fn draw_window() {
    kos::start_window_draw();
    kos::define_window(
        Dot { x: 50, y: 50 },
        Size {
            width: 300,
            height: 400,
        },
        WindowParams {
            color: Color::rgb(0xff, 0xff, 0xff),
            kind: WindowKind::Themed,
            title: Some(HEADER),
        },
    );
    kos::display_message(
        Dot { x: 0, y: 10 },
        WindowTextParams {
            color: Color::rgb(0x66, 0x22, 0x22),
            text: MSG,
            bg_color: None,
        },
    );
    kos::end_window_draw();
}

#[no_mangle]
fn kol_main() -> ! {
    draw_window();

    while let Some(ev) = kos::fetch_event() {
        match ev {
            Event::Redraw => draw_window(),
            Event::KeyPress => drop(kos::fetch_key()),
            _ => break,
        }
    }

    kos::exit();
}